.NET 3.5 Reference Poster: Here is an updated .NET Framework Common Namespaces and Types Poster that you can also print out for free. It details some of the new namespaces and important types in .NET 3.5.

Sound Events for Visual Studio: Apparently you you assign sounds to fire when Visual Studio events happen (for example: a build error). I can’t think of a really good use for this other than to annoy co-workers. Potentially something fun you can enable on their machine when they go to lunch.

IIS 7.0

Running 32-bit and 64-bit ASP.NET versions at the same time in different worker processes: With IIS6 you either had to run all web worker processes in 32-bit mode, or all of them in 64-bit mode. There was no easy way to mix and match depending on the application (you couldn’t have one 32-bit ASP.NET application that needed to use a C++ component on the same machine as another 64-bit ASP.NET application in a separate application pool). With IIS 7.0 this is now supported and easy to enable. Rakki Muthukumar from Microsoft support describes how to configure this.

.NET 3.5 Add-In Model: Jack Gudenkauf is a developer on my team who has driven the design of the new System.AddIn namespace in .NET 3.5. This namespace makes it easier to build add-in extensibility to your client applications. Among other things, this enables you to isolate addins and WPF controls across application domain and process boundaries (here is a sample of one). Watch Jack’s Channel9 video to learn more.

Data Binding in WPF: A nice MSDN Magazine article from John Papa that describes some of the basics of how WPF’s binding model works. Josh Twist also has some good WPF databinding companion articles that complement this here and here. To learn WPF in more detail, I highly recommend Adam Nathan’s excellent WPF Unleashed book (still 5 stars after 45 reviews on Amazon.com). The next public release of Silverlight 1.1 will support the same powerful databinding model that is in the full WPF, and will make building data aware applications much easier.